SPRUII0F May 2019 – June 2024 TMS320F28384D , TMS320F28384D-Q1 , TMS320F28384S , TMS320F28384S-Q1 , TMS320F28386D , TMS320F28386D-Q1 , TMS320F28386S , TMS320F28386S-Q1 , TMS320F28388D , TMS320F28388S
In addition to the pipeline there are a few other behaviors of the DMA that affect the total throughput:
For example, to transfer 128 16-bit words from GS0 RAM to GS3 RAM, a channel can be configured to transfer 8 bursts of 16 words/burst. This gives:
8 bursts * [(3 cycles/word * 16 words/burst) + 1] = 392 cycles |
If instead the channel were configured to transfer the same amount of data 32 bits at a time (the word size is configured to 32 bits), the transfer can take:
8 bursts * [(3 cycles/word * 8 words/burst) + 1] = 200 cycles |
The DMA module consists of a 3-stage pipeline as shown in Figure 11-5 and Figure 11-6.